Crystal structure of 4-(6-chloro-4-oxo-4H-chromen-3-yl)-2-methyl­amino-3-nitro-4H,5H-pyrano[3,2-c]chromen-5-one chloro­form monosolvate

Acta Crystallographica Section E: Crystallographic Communications

SubbiahPandi, A.¹  Raja, R.¹  Kandhasamy, S.²  Perumal, P.T.² 

[1] Department of Physics, Presidency College (Autonomous), Chennai 600 005, India;Organic Chemistry Division, CSIR Central Leather Research Institute, Chennai 600 020, India

关键词: CRYSTAL STRUCTURE;    CHROMENE;    CHROMONES;    PYRAN;    HYDROGEN BONDING;    C-H...[PI] INTERACTIONS;    [PI]-[PI] INTERACTIONS;    INVERSION DIMERS;   

DOI  :  10.1107/S2056989015011810

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

In the title compound, C23H14Cl4N2O7, the pyran ring has an envelope conformation with the methine C atom as the flap. The chromene rings are almost planar (r.m.s. deviations of 0.027 and 0.018 Å) and their mean planes are inclined to one another by 85.61 (10)°. The mean planes of the pyran ring and the chromene ring fused to it are inclined to one another by 7.41 (13)°. The mol­ecular structure is stabilized by an intra­molecular N—H⋯O hydrogen bond, generating an S(6) ring motif. In the crystal, mol­ecules are linked by pairs of N—H⋯O hydrogen bonds, forming inversion dimers with an R22(12) ring motif. The dimers are linked by pairs of C—H⋯O hydrogen bonds, enclosing R22(18) ring motifs, forming chains along [010]. Within the chains there are C—H⋯π inter­actions. The chains are linked via slipped parallel π–π inter­actions, forming a three-dimensional structure [the shortest inter-centroid distance is 3.7229 (19) Å].

【 授权许可】

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